TestWork/verylonginteger.h at master · itsumo2009/TestWork · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
#ifndef VERYLONGINTEGER_H
#define VERYLONGINTEGER_H

#include <QVector>

class VeryLongInteger
{
public:
    VeryLongInteger();
    VeryLongInteger(const QVector<qint64>& digits);
    VeryLongInteger(const qint64& initialValue);
    VeryLongInteger(const QString& stringValue);
public:
    bool operator <(const VeryLongInteger& right) const;
    bool operator >(const VeryLongInteger& right) const;
    bool operator ==(const VeryLongInteger& right) const;
    bool operator !=(const VeryLongInteger& right) const;

    VeryLongInteger& operator +=(const VeryLongInteger& right);
    VeryLongInteger& operator -=(const VeryLongInteger& right);

    QString toString() const;

    bool isNegative() const;
private:
    qint64 digit(int position) const;
    void setDigit(int position, qint64 value);

    int compareModule(const VeryLongInteger& right);

private:
    QVector<qint64> _digits;
    bool _negative;
};

#endif // VERYLONGINTEGER_H